Answer / abhishek chourey

DP transmitter can be calibrate by two type 1st loop & 2nd isolate in both calibration we need pressure calibrator that should be calibrate by authorized laboratory.

loop calibration:- in this calibration pressure apply to DP transmitter set the pressure on Calibrator and check on display of DP transmitter.

Isolation Calibration:- output measure in form of 4-20 mA and calculate 4-20 with respect to full range of Instrument.

Answer / santosh kumar

High side presser and low side atmosphere then callibeat transmitter.

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